1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_fixunsxfsi
3
4#include "int_lib.h"
5#include <stdio.h>
6
7#if HAS_80_BIT_LONG_DOUBLE
8// Returns: convert a to a unsigned int, rounding toward zero.
9// Negative values all become zero.
10
11// Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
12// su_int is a 32 bit integral type
13// value in long double is representable in su_int or is negative
14// (no range checking performed)
15
16// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
17// 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
18
19COMPILER_RT_ABI su_int __fixunsxfsi(long double a);
20
21int test__fixunsxfsi(long double a, su_int expected)
22{
23 su_int x = __fixunsxfsi(a);
24 if (x != expected)
25 printf("error in __fixunsxfsi(%LA) = %X, expected %X\n", a, x, expected);
26 return x != expected;
27}
28
29char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
30char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
31#endif
32
33int main()
34{
35#if HAS_80_BIT_LONG_DOUBLE
36 if (test__fixunsxfsi(0.0, 0))
37 return 1;
38
39 if (test__fixunsxfsi(0.5, 0))
40 return 1;
41 if (test__fixunsxfsi(0.99, 0))
42 return 1;
43 if (test__fixunsxfsi(1.0, 1))
44 return 1;
45 if (test__fixunsxfsi(1.5, 1))
46 return 1;
47 if (test__fixunsxfsi(1.99, 1))
48 return 1;
49 if (test__fixunsxfsi(2.0, 2))
50 return 1;
51 if (test__fixunsxfsi(2.01, 2))
52 return 1;
53 if (test__fixunsxfsi(-0.5, 0))
54 return 1;
55 if (test__fixunsxfsi(-0.99, 0))
56 return 1;
57#if !TARGET_LIBGCC
58 if (test__fixunsxfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
59 return 1;
60 if (test__fixunsxfsi(-1.5, 0))
61 return 1;
62 if (test__fixunsxfsi(-1.99, 0))
63 return 1;
64 if (test__fixunsxfsi(-2.0, 0))
65 return 1;
66 if (test__fixunsxfsi(-2.01, 0))
67 return 1;
68#endif
69
70 if (test__fixunsxfsi(0x1.000000p+31, 0x80000000))
71 return 1;
72 if (test__fixunsxfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
73 return 1;
74 if (test__fixunsxfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
75 return 1;
76 if (test__fixunsxfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
77 return 1;
78
79#if !TARGET_LIBGCC
80 if (test__fixunsxfsi(-0x1.FFFFFEp+30, 0))
81 return 1;
82 if (test__fixunsxfsi(-0x1.FFFFFCp+30, 0))
83 return 1;
84#endif
85
86 if (test__fixunsxfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
87 return 1;
88 if (test__fixunsxfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
89 return 1;
90 if (test__fixunsxfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
91 return 1;
92
93#endif
94 return 0;
95}
96